Radeng
This is what the EU says
Upgrading and downgrading
1. If an operating air carrier places a passenger in a class
higher than that for which the ticket was purchased, it may not
request any supplementary payment.
2. If an operating air carrier places a passenger in a class
lower than that for which the ticket was purchased, it shall
within seven days, by the means provided for in Article 7(3),
reimburse
(a) 30 % of the price of the ticket for all flights of 1 500 kilometres
or less, or
17.2.2004 EN Official Journal of the European Union L 46/5
(b) 50 % of the price of the ticket for all intra-Community
flights of more than 1 500 kilometres, except flights
between the European territory of the Member States and
the French overseas departments, and for all other flights
between 1 500 and 3 500 kilometres, or
(c) 75 % of the price of the ticket for all flights not falling
under (a) or (b), including flights between the European
territory of the Member States and the French overseas
departments.
Go get 'em, Floyd.
I would love to see them try and argue 'extraordinary' circumstances when they had considerable advance warning of the strike.